Question: When was Countess Isabel of Gloucester the wife of John of England?
Paraphrase: John of England had a wife, Countess Isabel of Glouchester, during what time period?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q129308 p:P26 ?s . ?s ps:P26 wd:Q242636 . ?s pq:P580 ?value}